Digital Phone Company Limited (commonly known as AIS GSM 1800) is a mobile network operator in Thailand assigned PLMN code 520-23 by the national telecommunications authority.

The MCC 520 identifies Thailand, while MNC 23 uniquely identifies this operator within the country. Together they form the PLMN (Public Land Mobile Network) identifier used by mobile devices for network selection, SIM card identification, and international roaming.

This assignment was last reported in ITU Operational Bulletin #1280 (Nov. 15, 2023). Search all MCC/MNC codes or view all Thailand operators .